Developed at NASA's Langley Research Center, Greased Lightning is currently in the design and testing phase. The battery powered drone has a 10-foot wingspan, eight electric motors on the wings, two electric motors on the tail and weighs a maximum of 62 pounds at takeoff.

Greased Lightning has successfully transitioned from hovering like a helicopter to plane-style wing-borne flight during tests.

Much quieter than a traditional aircraft, NASA engineers say that Greased Lightning makes even less noise than a neighbor mowing their lawn with a gas-powered motor.